Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Jan. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs unpaid	$ 0
Severance costs incurred	0
Receivable from sale of business	205	$ 789	$ 255
Property, plant and equipment, net	113,767	118,429	116,162
Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs unpaid	0	55
Severance costs incurred	0	477
Impairment charges related to exit activity	0	0
Gain (Loss) on Disposition of Assets	0	364
Receivable from sale of business	205	789
Cost of Sales [Member] | Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs incurred		393
Selling, General and Administrative Expenses [Member] | Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs incurred		84
Assets Held-for-sale [Member]
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment, net	$ 800	$ 906	$ 800